Impeller, rotary machine, and turbocharger
AssigneeMitsubishi Heavy Industries Engine & Turbocharger, Ltd.
InventorsYutaka Fujita, Tadashi Kanzaka, Hiroaki Yoshizawa
Life of this patent
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Abstract
This compressor wheel (3) is provided with a disc (22) which is formed in a disc shape and provided to be rotatable around a central axis (C); and a plurality of blades (23) provided on a disc surface (22f) facing a first side in the central axis (C) direction with an interval in a circumferential direction around the central axis (C). A rear surface (22r) of the disc (22) facing a second side in the central axis (C) direction has a convex curved surface (25) which is convex toward the second side in the central axis (C) direction at least part of a center portion of the disc (22).
Claims8
A rotary machine comprising:
- a rotating shaft which extends along a central axis;
- and
- an impeller provided on the rotating shaft,
- wherein the impeller comprising:
- a disc provided on the rotating shaft;
- and
- a plurality of blades provided on a surface of the disc on a first direction in a central axis direction,
- wherein the plurality of blades are provided at intervals in a circumferential direction around the central axis,
- wherein the disc includes a surface on a side opposite to the first direction in the central axis direction having a convex curved surface which is convex toward the side opposite to the first direction in the central axis direction,
- wherein the convex curved surface has a shape being continuously and smoothly convex from an outer circumferential side of the disc toward the central axis,
- wherein the rotary machine further comprises a collar provided on the rotating shaft, and
- wherein the collar is configured to contact with the convex curved surface at around the central axis.
A turbocharger comprising:
- a rotating shaft which extends along a central axis;
- and
- an impeller provided on the rotating shaft,
- wherein the impeller comprising:
- a disc provided on the rotating shaft;
- and
- a plurality of blades provided on a surface of the disc on a first direction in a central axis direction,
- wherein the plurality of blades are provided at intervals in a circumferential direction around the central axis,
- wherein the disc includes a surface on a side opposite to the first direction in the central axis direction having a convex curved surface which is convex toward the side opposite to the first direction in the central axis direction,
- wherein the convex curved surface has a shape being continuously and smoothly convex from an outer circumferential side of the disc toward the central axis,
- wherein the rotary machine further comprises a collar provided on the rotating shaft, and
- wherein the collar is configured to contact with the convex curved surface at around the central axis.
Dependencies are inferred from the claim text.